Mystery leak.

Does anyone know what is leaking here? 2002 xtracab TRD with 237k
Recently in the last month fixed leaking valve covers. And then fixed timing belt cover leak. Did all the associated gaskets and seals as well as new belts and water pump. Thought this could have been oil pressure switch so changed that but it is still leaking. I’m lost. One picture is after being sprayed down with brake clean. And the wet one is after a few days.

 

Fixing that might be more problems that it is worth. There are a few posts where guys have cracked their blocks attempting to fix a seapage issue.

 

When you did the valve cover gaskets, did you do the half moons as well?